[SCSI] qla4xxx: Added support to update mtu

Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

3 files changed, 15 insertions, 0 deletions

diff --git a/drivers/scsi/qla4xxx/ql4_def.h b/drivers/scsi/qla4xxx/ql4_def.h
index 30efb6c6594c..90dc621a926a 100644
--- a/drivers/scsi/qla4xxx/ql4_def.h
+++ b/drivers/scsi/qla4xxx/ql4_def.h
@@ -343,6 +343,7 @@ struct ipaddress_config {
         struct in6_addr ipv6_addr0;
         struct in6_addr ipv6_addr1;
         struct in6_addr ipv6_default_router_addr;
+        uint16_t eth_mtu_size;
 };
 
 #define QL4_CHAP_MAX_NAME_LEN 256
diff --git a/drivers/scsi/qla4xxx/ql4_mbx.c b/drivers/scsi/qla4xxx/ql4_mbx.c
index 72ec7e092296..8741cfa98427 100644
--- a/drivers/scsi/qla4xxx/ql4_mbx.c
+++ b/drivers/scsi/qla4xxx/ql4_mbx.c
@@ -333,6 +333,8 @@ qla4xxx_update_local_ip(struct scsi_qla_host *ha,
         ha->ip_config.ipv4_options = le16_to_cpu(init_fw_cb->ipv4_ip_opts);
         ha->ip_config.ipv4_addr_state =
                                 le16_to_cpu(init_fw_cb->ipv4_addr_state);
+        ha->ip_config.eth_mtu_size =
+                                le16_to_cpu(init_fw_cb->eth_mtu_size);
 
         if (ha->acb_version == ACB_SUPPORTED) {
                 ha->ip_config.ipv6_options = le16_to_cpu(init_fw_cb->ipv6_opts);
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 15355f95f560..58a270b74b2a 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -230,6 +230,7 @@ static mode_t ql4_attr_is_visible(int param_type, int param)
                 case ISCSI_NET_PARAM_VLAN_ID:
                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
                 case ISCSI_NET_PARAM_VLAN_ENABLED:
+                case ISCSI_NET_PARAM_MTU:
                         return S_IRUGO;
                 default:
                         return 0;
@@ -335,6 +336,9 @@ static int qla4xxx_get_iface_param(struct iscsi_iface *iface,
                                        IPV6_OPT_VLAN_TAGGING_ENABLE) ?
                                        "enabled" : "disabled");
                 break;
+        case ISCSI_NET_PARAM_MTU:
+                len = sprintf(buf, "%d\n", ha->ip_config.eth_mtu_size);
+                break;
         default:
                 len = -ENOSYS;
         }
@@ -718,6 +722,10 @@ static void qla4xxx_set_ipv6(struct scsi_qla_host *ha,
                         init_fw_cb->ipv6_opts &=
                                 cpu_to_le16(~IPV6_OPT_VLAN_TAGGING_ENABLE);
                 break;
+        case ISCSI_NET_PARAM_MTU:
+                init_fw_cb->eth_mtu_size =
+                                cpu_to_le16(*(uint16_t *)iface_param->value);
+                break;
         default:
                 ql4_printk(KERN_ERR, ha, "Unknown IPv6 param = %d\n",
                            iface_param->param);
@@ -778,6 +786,10 @@ static void qla4xxx_set_ipv4(struct scsi_qla_host *ha,
                         init_fw_cb->ipv4_ip_opts &=
                                         cpu_to_le16(~IPOPT_VLAN_TAGGING_ENABLE);
                 break;
+        case ISCSI_NET_PARAM_MTU:
+                init_fw_cb->eth_mtu_size =
+                                cpu_to_le16(*(uint16_t *)iface_param->value);
+                break;
         default:
                 ql4_printk(KERN_ERR, ha, "Unknown IPv4 param = %d\n",
                            iface_param->param);